<div class="pure-menu ui-sidebar">
  <ul class="pure-menu-list">
    <li class="pure-menu-heading">Tools</li>
    <li class="pure-menu-item tools-container">
      <button class="tool-item flaticon-eye" data-tool="camera_control"></button>
      <button class="tool-item flaticon-3d" data-tool="single_voxel"></button>
      <button class="tool-item flaticon-eraser" data-tool="remove_voxel"></button>
    </li>
    <li class="pure-menu-heading" data-plugin-color-picker>Color</li>
    <li class="pure-menu-item brush-color-container" data-plugin-color-picker>
      <button class="brush-color brown" data-color="#800000"></button>
      <button class="brush-color red" data-color="#FF0000"></button>
      <button class="brush-color black" data-color="#000000"></button>
      <button class="brush-color white" data-color="#FFFFFF"></button>
      <button class="brush-color yellow" data-color="#FFFF00"></button>
      <button class="brush-color lime" data-color="#00FF00"></button>
      <button class="brush-color green" data-color="#008000"></button>
      <button class="brush-color aqua" data-color="#00FFFF"></button>
      <button class="brush-color blue" data-color="#0000FF"></button>
      <button class="brush-color fuchsia" data-color="#FF00FF"></button>
      <button class="brush-color purple" data-color="#800080"></button>
      <button class="brush-color orange" data-color="#FF8000"></button>
      <input type="text" id="brush-color-input" class="brush-color-input" />
    </li>
  </ul>
</div>